ARM: dts: Add pinmuxing for i2c2 and i2c3 for LogicPD torpedo

Since I2C1 and I2C4 have explicit pinmuxing set, let's be on the
safe side and set the pin muxing for I2C2 and I2C3.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>